20120280 Ver 3_Stormwater Info_20130603

Strickland, Bev
From: Lucas, Annette
Sent: Wednesday, June 05, 2013 10:03 AM
To: Strickland, Bev
Subject: FW: Marketplace at Tramway - Revised Stormwater Pond
Attachments: REV Submittal to DWQ 5- 30- 13.pdf; IMPERVIOUS AREA SUMMARY - MARKETPLACE
REV 5- 13.pdf; CALCS - MARKETPLACE SWM REV 5- 13.pdf; PDF PLANS - Marketplace at
Tramway - 5- 30- 13.pdf
' -. •#
Thanks,
Annette
From: jeremy thomas [ mailto: jthomas @jthomasengineering.com]
Sent: Monday, June 03, 2013 6:51 PM
To: Lucas, Annette
Subject: RE: Marketplace at Tramway - Revised Stormwater Pond
t'l
Attached are the pdf files of the revised submittal. Please do not hesitate to call with any questions. Thanks for your
help!
Jeremy
From: Lucas, Annette [ mailto :annette.lucasCa)ncdenr.aov]
Sent: Sunday, June 02, 2013 8:08 PM
To: jeremy thomas
Subject: RE: Marketplace at Tramway - Revised Stormwater Pond
Jeremy,
Please provide one hard copy of everything and one disk with everything in .pdf (or you can email the files to me in .pdf if
that is easier)
Thanks,
Annette
From: jeremy thomas [ jthomas @jthomasengineering.com]
Sent: Friday, May 31, 2013 3:51 PM
To: Lucas, Annette
Subject: RE: Marketplace at Tramway - Revised Stormwater Pond
MENIM
I plan to deliver the revisions to you next week. How many copies of the revised plans and computations will you
require?
Thanks,
Jeremy
From: Lucas, Annette [ mailto :annette.lucasCa)ncdenr.aov]
Sent: Wednesday, May 22, 2013 10:40 AM
To: jthomas jthomasenaineerina.com

Cm: Higgins, Karen
Subject: FVV: Marketplace atTramway - RevisedStormwaterPnnd
Jeremy,
Please submit a request to revise your stormvvater management plan and provide updated plan sheets and calculations.
There is no fee required, but please do include a brief transmittal letter explaining the changes to the plan and reference
the project number, which is12-O2QO.
I'll be glad to answer any additional questions you may have.
Thanks,
Annette
Annette M. Lucas, PE
Environmental Engineer
lVCI}IClVR I DW() I Wetlands and BtorcuwaterBranch
I85O Mail Service Center, Raleigh, lVC 27699 -1650 (D�ail)
512 N. Salisbury St, Raleigh, NC 27804 1 Q'u Floor (1,00atiora8n Parcels)
Phone: (9I9) 807-838I 1 Fax: [phone] Email:
Webaite:
A Before printing this email, please consider your budget and the environment.
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
From: jenemythomas
Sent: Monday May 20, 2013 9:03 PM
To: Higgins, Karen
Subject: FVV: Marketo|aoeatTnamway - RevisedStonnwaterPnnd
saudow
| will be submitting a revised stormvvater management plan for the Marketplace at Tramway, in Sanford (Certification
number 3881). The Owner has acquired a little more property and would like to relocate the stormwater management
facility (wet detention pond). There will beno additional impacts to jurisdictional waters. Please advise onthe
submittal requirements for this type modification.
Thanks!
Jeremy Thomas
Jeremy R. Thomas, PE
143 Charlotte Avenue, Suite 104

mobile: [phone]
email:
From: Burdette,]ennhera
Sent: Monday May 20, 2013 8:45 AM
To: jenemythomas
Subject: RE: Marketplace at Tramway - Revised Stormvvater Pond
Jeremy,
You'll need to contact Annette Lucas at 919/807-6381 with technical questions, but the application would need to be
sent to Karen Higgins at the following applicable address.
NC DWQ, Webscape Unit
NC DWQ, Webscape Unit
512 North Salisbury Street
Jennifer
Jennifer A'BurdetUe
Environmental Senior Specialist
Wetlands, Buffers, Stonnmmter Compliance and Permitting Unit
(VVeBS[aPeUnid
Wetlands and StormwaUerBranch
N[ Division of Water Quality
165O Mail Service Center
Raleigh, N[Z7699-165O
(919)8O7-6364phone
(919)8O7-6494fax
*Email correspondence tnond/rom this address may be subject to the North Carolina Public Records Low and may be disclosed to
third parties unless the content is exempt by statute or other regulation.*
91

From: jeremy thomas [mai Ito: jthomas jthomasenaineerina.com]
Sent: Thursday, May 16, 2013 10:27 AM
To: Burdette, Jennifer a
Subject: Marketplace at Tramway - Revised Stormwater Pond
Hey Jennifer,
Hope things are going well with your new job. We are revising the location and configuration of the stormwater pond
at Marketplace at Tramway. Who do I need to contact regarding a review of this change.
Thanks,
Jeremy
Jeremy R. Thomas, PE
JThomas Ln incering, Inc.
143 Charlotte Avenue, Suite 104
Sanford, North Carolina 27330
office: 919 - 777 -6010
mobile: 919 - 356 -9105
email: [e-mail]

J Tkorna-5 F—ngineerin& Ini
civil engineering e planning
143 Charlotte Avenrie, SU to 10
Sanford, North Carolina 77330
(919) 777 -6010 phone
ww w,jthurriasengineering,curri
License No, C -3389
May 31, 2013
Ms. Annette Lucas
NC DWQ, Webscape Unit
512 North Salisbury Street
Raleigh, N.C. 27604
Reference: Marketplace at Tramway — Revisions to Approved SWM Plan (12 -0280)
Lee County, North Carolina
Dear Annette:
Please find enclosed for your review one (1) copy of the revised Stormwater Management
(SWM) Plans and Computations for the Marketplace at Tramway (12- 0280). The SWM plans
have been revised because the Owner recently purchased additional property (approximately
six (6) acres) adjacent to the project site that is better suited for the BMP wet detention pond
location. The revised plans show the BMP wet detention pond in this new location. Also, the
total impervious area shown on the SWM plan increased slightly due to some additional parking
added where the BMP wet detention pond was originally sited (however the % impervious has
decreased from the original plan due to the increased site area). The revised Impervious Area
Summary is also enclosed.
If you require any additional information, please contact me at your convenience. Thank you
for your assistance on this project.
Sincerely,

MARKETPLACE AT TRAMWAY STORMWATER MANAGEMENT PLAN
STORMWATER MANAGEMENT PLAN
2/1/2012 ( *REV MAY 2013 *)
IMPERVIOUS AREA SUMMARY
TOTAL SITE AREA:
IMPERVIOUS AREAS (PER SITE PLAN)
BUILDINGS
ROADS / PARKING
TOTAL IMPERVIOUS AREA:
PERCENT IMPERVIOUS AREA:
MAX. IMPERVIOUS AREA ALLOWED PER ZONING
51.0 AC +/-
250,000 SF
1,070,000 SF
1,320,000 SF
59%
80%

Stormwater Management Computations
BMP Design
MARKETPLACE AT TRAMWAY
Sanford, North Carolina
FEBRUARY 2012
*REVISED MAY 2013*
Prepared by:
J Tkomas r ngincerin& Ini
civil ergireerir"�-' •larrir"�-'
�cOW
43 Charlotte Avenue, tie to 04
Sawiford, North Carohna 27330
fet
o m a, e n g i n een: n coy
License no, C 3389
usn_ ....S.0
�� � r

Permit No
(to be provided by DWQ)
Project name
Contact person
Phone number
Date
Drainage area number
MARKETPLACE AT TRAMWAY
JEREMY R. THOMAS, P.E.
919 - 777 -6010
May -13
1
0� "
N (Y or N)
Site Characteristics
fit XLK_
NCDENR
2,001,750 ft'
Impervious area, post - development
1,320,000 ft'
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
65.94 %
Design rainfall depth
401 CERTIFICATION APPLICATION FORM
Storage Volume: Non -SA Waters
N/A ft3 /sec
WET DETENTION BASIN SUPPLEMENT
107,535 ft3 OK
Volume provided
This form must be filled out, printed and submitted.
Temporary pool elevation
OK, volume provided is equal to or in excess of volume required.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
474.30 fmsl
Project name
Contact person
Phone number
Date
Drainage area number
MARKETPLACE AT TRAMWAY
JEREMY R. THOMAS, P.E.
919 - 777 -6010
May -13
1
II. DESIGN INFORMATION
N (Y or N)
Site Characteristics
in
Drainage area
2,001,750 ft'
Impervious area, post - development
1,320,000 ft'
% impervious
65.94 %
Design rainfall depth
1.0 in
Storage Volume: Non -SA Waters
N/A ft3 /sec
Minimum volume required
107,535 ft3 OK
Volume provided
115,198 ft3
Temporary pool elevation
OK, volume provided is equal to or in excess of volume required.
Storage Volume: SA Waters
474.30 fmsl
1.5" runoff volume
N/A ft3
Pre - development 1 -yr, 24 -hr runoff
ft3
Post - development 1 -yr, 24 -hr runoff
ft3
Minimum volume required
ft3
Volume provided ft3
Peak Flow Calculations
Is the pre /post control of the 1 yr 24hr storm peak flow required?
N (Y or N)
1 -yr, 24 -hr rainfall depth
in
Rational C, pre - development
(unitless)
Rational C, post - development
(unitless)
Rainfall intensity: 1 -yr, 24 -hr storm
in /hr
Pre - development 1 -yr, 24 -hr peak flow
N/A ft3 /sec
Post - development 1 -yr, 24 -hr peak flow
N/A ft3 /sec
Pre /Post 1 -yr, 24 -hr peak flow control
#VALUE! ft3 /sec
Elevations
Temporary pool elevation
476.00 fmsl
Permanent pool elevation
474.30 fmsl
SHWT elevation (approx. at the perm. pool elevation)
fmsl
Top of 1 Oft vegetated shelf elevation
474.80 fmsl
Bottom of 1 Oft vegetated shelf elevation
473.80 fmsl Data not needed for calculation option #1, but OK if provided.
Sediment cleanout, top elevation (bottom of pond)
469.00 fmsl
Sediment cleanout, bottom elevation
468.00 fmsl Data not needed for calculation option #1, but OK if provided.
Sediment storage provided
1.00 ft
Is there additional volume stored above the state - required temp. pool?
N (Y or N)
Elevation of the top of the additional volume
fmsl
Form SW401 -Wet Detention Basin- Rev.8- 9/17/09 Parts I. & II. Design Summary, Page 1 of 2

Surface Areas
OK
10 :1
Area, temporary pool
ft
OK
Area REQUIRED, permanent pool
60,053 ft
1.5 :1
SA/DA ratio
3.00 (unitless)
OK
Area PROVIDED, permanent pool, Aperm_pool
62,057 ft'
OK
Area, bottom of 1 Oft vegetated shelf, Abot shelf
47,559 ft'
OK
Area, sediment cleanout, top elevation (bottom of pond), Abot pond
35,772 ft'
POND DRAIN AT BOTTOM
Volumes
Volume, temporary pool
115,198 ft
OK
Volume, permanent pool, Vperm_pool
269,443 ft
Volume, forebay (sum of forebays if more than one forebay)
51,892 ft
Forebay % of permanent pool volume
19.3% %
OK
SAIDA Table Data
Design TSS removal
90 %
Coastal SA/DA Table Used?
N (Y or N)
Mountain /Piedmont SA/DA Table Used?
Y (Y or N)
SA/DA ratio
3.00 (unitless)
Average depth (used in SA/DA table):
Calculation option 1 used? (See Figure 10 -2b)
Y (Y or N)
Volume, permanent pool, Vperm_pool
269,443 ft'
Area provided, permanent pool, Aperm_pool
62,057 ft'
Average depth calculated
4.34 ft
OK
Average depth used in SA/DA, deV, (Round to nearest 0.5ft)
4.5 ft
OK
Calculation option 2 used? (See Figure 10 -2b)
N (Y or N)
Area provided, permanent pool, Aperm_pool
62,057 ft'
Area, bottom of 1 Oft vegetated shelf, Abot shelf
47,559 ft'
Area, sediment cleanout, top elevation (bottom of pond), Abot pond
35,772 ft
"Depth" (distance b/w bottom of 1 Oft shelf and top of sediment)
4.80 ft
Average depth calculated
ft
Average depth used in SA/DA, deV, (Round to nearest 0.5ft)
ft
Drawdown Calculations
Drawdown through orifice?
Diameter of orifice (if circular)
Area of orifice (if- non - circular)
Coefficient of discharge (Cc)
Driving head (Ho)
Drawdown through weir?
Weir type
Coefficient of discharge (C.)
Length of weir (L)
Driving head (H)
Pre - development 1 -yr, 24 -hr peak flow
Post - development 1 -yr, 24 -hr peak flow
Storage volume discharge rate (through discharge orifice or weir)
Storage volume drawdown time
Additional Information
Vegetated side slopes
Vegetated shelf slope
Vegetated shelf width
Length of flowpath to width ratio
Length to width ratio
Trash rack for overflow & orifice?
Freeboard provided
Vegetated filter provided?
Recorded drainage easement provided?
Capures all runoff at ultimate build -out?
Drain mechanism for maintenance or emergencies is
y (Y or N)
6.00 in
i n 2
0.60 (unitless)
1.45 ft
N/A (Y or N)
(unitless)
(unitless)
ft
ft
N/A ft3 /sec
N/A ft3 /sec
0.65 ft3 /sec
2.05 days
OK, draws down in 2 -5 days.
3 :1
OK
10 :1
OK
10.0 ft
OK
3 :1
OK
1.5 :1
OK
Y (Y or N)
OK
Y ft
OK
N (Y or N)
OK
Y (Y or N)
OK
Y (Y or N)
OK
POND DRAIN AT BOTTOM
OF RISER
Permit No
(to be provided by DWQ)
Form SW401 -Wet Detention Basin- Rev.8- 9/17/09 Parts I. & II. Design Summary, Page 2 of 2

MARKETPLACE AT TRAMWAY
STORMWATER MANAGEMENT PLAN
May -13
POND STAGE - STORAGE TABLE
BMP 01
I�LI_\1011i701�1
ELEVATION (FT)
AREA (SF)
INC. VOLUME (CF)
CUM. VOLUME (CF)
BOTTOM
469
35,772
0
0
470
38,120
36,946
36,946
471
40,525
39,323
76,269
472
42,986
41,756
118,024
473
45,504
44,245
162,269
474
49,300
47,402
209,671
PERM POOL
474.3
51,957
15,189
224,860
475
57,069
38,159
263,019
TEMP POOL
476
59,888
58,479
321,497
477
76,702
74,109
395,606
478
80,103
78,403
474,008
479
85,559
82,831
556,839
TOP OF BERM
480
88,929
87,244
644,083
FOREBAY
BOTTOM
469
6,640
0
0
470
7,276
6,958
6,958
471
7,938
7,607
14,565
472
8,626
8,282
22,847
473
9,339
8,983
31,830
474
10,076
9,708
41,537
PERM POOL
474.3
10,100
3,026
44,563
475
10,838
7,328
51,892
TEMP POOL
476
11,627
11,233
63,124

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